<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			console.log(1-1);		//0
console.log(1-"1");		//0
// console.log(1n-1n);		//0n
// console.log(1n+1);		//TypeError
console.log(1-true);	//0
console.log("1"-true);	//0
console.log("1"-"true");//NaN
		</script>
	</body>
</html>
